Feature Name | Class | Elev.
meters | County | Latitude
DMS | Longitude
DMS |
| Mastersonville Post Office (historical) | Post Office | 159 | Lancaster | 40 11 48 N | 076 29 14 W |
| Maud Post Office (historical) | Post Office | 20 | Bucks | 40 05 12 N | 074 56 41 W |
| Maytown Post Office (historical) | Post Office | 124 | Lancaster | 40 04 31 N | 076 34 56 W |
| McClellandtown Post Office | Post Office | 343 | Fayette | 39 53 18 N | 079 52 04 W |
| McKean Post Office | Post Office | 347 | Erie | 41 59 49 N | 080 08 06 W |
| McLallen Post Office | Post Office | 371 | Erie | 41 52 48 N | 080 02 58 W |
| Mechanics Grove Post Office (historical) | Post Office | 194 | Lancaster | 39 50 55 N | 076 09 31 W |
| Mechanicsville Post Office | Post Office | 136 | Bucks | 40 20 39 N | 075 04 32 W |
| Michener Post Office (historical) | Post Office | 106 | Bucks | 40 22 36 N | 075 04 54 W |
| Millersville Post Office (historical) | Post Office | 99 | Lancaster | 39 59 52 N | 076 21 15 W |
| Millway Post Office (historical) | Post Office | 104 | Lancaster | 40 09 40 N | 076 14 09 W |
| Mingoville Post Office (historical) | Post Office | 355 | Centre | 40 55 24 N | 077 38 47 W |
| Morea Colliery Post Office | Post Office | 457 | Schuylkill | 40 47 22 N | 076 10 17 W |
| Mount Gretna Post Office (historical) | Post Office | 205 | Lebanon | 40 14 51 N | 076 28 10 W |
| Mount Healthy Post Office (historical) | Post Office | 645 | Somerset | 39 56 01 N | 078 47 03 W |
| Mount Hope Post Office (historical) | Post Office | 160 | Lancaster | 40 13 19 N | 076 25 18 W |
| Mount Pleasant Mills Post Office (historical) | Post Office | 175 | Snyder | 40 43 23 N | 077 00 59 W |
| Mountville Post Office (historical) | Post Office | 135 | Lancaster | 40 02 21 N | 076 25 51 W |
| Muddy Creek Post Office (historical) | Post Office | 140 | Lancaster | 40 10 58 N | 076 03 04 W |
| Neale Post Office (historical) | Post Office | 246 | Armstrong | 40 42 26 N | 079 34 11 W |
| New Baltimore Post Office (historical) | Post Office | 434 | Somerset | 39 59 09 N | 078 46 22 W |
| New Bloomfield Post Office (historical) | Post Office | 205 | Perry | 40 25 10 N | 077 11 12 W |
| New Danville Post Office (historical) | Post Office | 123 | Lancaster | 39 59 11 N | 076 18 54 W |
| New Holland Post Office (historical) | Post Office | 150 | Lancaster | 40 06 06 N | 076 05 07 W |
| New Mayville Post Office (historical) | Post Office | 379 | Clarion | 41 03 01 N | 079 15 20 W |
| New Milltown Post Office (historical) | Post Office | 124 | Lancaster | 40 01 15 N | 076 03 32 W |
| New Providence Post Office (historical) | Post Office | 117 | Lancaster | 39 55 31 N | 076 11 53 W |
| New Texas Post Office (historical) | Post Office | 112 | Lancaster | 39 44 57 N | 076 09 50 W |
| Newtown Post Office (historical) | Post Office | 118 | Lancaster | 40 04 27 N | 076 29 34 W |
| Oak Hill Post Office (historical) | Post Office | 142 | Lancaster | 39 46 55 N | 076 05 23 W |
| Oak Shade Post Office (historical) | Post Office | 145 | Lancaster | 39 48 16 N | 076 06 45 W |
| Octoraro Post Office (historical) | Post Office | 98 | Lancaster | 39 52 13 N | 076 00 17 W |
| Old Hickory Post Office (historical) | Post Office | 543 | Bradford | 41 54 32 N | 076 53 20 W |
| Old Line Post Office (historical) | Post Office | 180 | Lancaster | 40 10 30 N | 076 27 25 W |
| Oley Post Office (historical) | Post Office | 135 | Berks | 40 23 15 N | 075 47 22 W |
| Ono Post Office | Post Office | 154 | Lebanon | 40 24 09 N | 076 32 14 W |
| Option Post Office (historical) | Post Office | 327 | Allegheny | 40 20 47 N | 079 58 24 W |
| Oregon Post Office (historical) | Post Office | 125 | Lancaster | 40 00 00 N | 076 14 42 W |
| Ottsville Post Office | Post Office | 152 | Bucks | 40 28 36 N | 075 09 54 W |
| Paradise Post Office (historical) | Post Office | 111 | Lancaster | 40 00 35 N | 076 07 43 W |
| Peach Botton Post Office | Post Office | 119 | Lancaster | 39 46 25 N | 076 10 45 W |
| Pecks Pond Post Office (historical) | Post Office | 419 | Pike | 41 16 59 N | 075 05 32 W |
| Pen Mar Post Office (historical) | Post Office | 377 | Franklin | 39 43 13 N | 077 30 24 W |
| Penn Post Office (historical) | Post Office | 184 | Lancaster | 40 12 14 N | 076 20 56 W |
| Pequea Post Office (historical) | Post Office | 132 | Lancaster | 40 02 05 N | 075 59 38 W |
| Peters Creek Post Office (historical) | Post Office | 118 | Lancaster | 39 44 35 N | 076 12 59 W |
| Petersville Post Office (historical) | Post Office | 71 | Lancaster | 39 58 56 N | 076 21 22 W |
| Pickering Post Office (historical) | Post Office | 42 | Chester | 40 06 33 N | 075 31 53 W |
| Pike Post Office (historical) | Post Office | 271 | Bradford | 41 46 35 N | 076 09 31 W |
| Pine Hill Post Office (historical) | Post Office | 727 | Somerset | 39 53 14 N | 078 59 23 W |
| Pineville Post Office | Post Office | 73 | Bucks | 40 17 42 N | 075 00 19 W |
| Pipersville Post Office (historical) | Post Office | 133 | Bucks | 40 25 31 N | 075 08 22 W |
| Pitman Post Office (historical) | Post Office | 289 | Schuylkill | 40 41 58 N | 076 32 41 W |
| Pittsville Post Office (historical) | Post Office | 406 | Venango | 41 15 20 N | 079 44 18 W |
| Planebrook Post Office (historical) | Post Office | 110 | Chester | 40 02 30 N | 075 34 46 W |
| Pleasant Grove Post Office (historical) | Post Office | 110 | Lancaster | 39 43 51 N | 076 11 38 W |
| Pleasent Valley Post Office (historical) | Post Office | 146 | Bucks | 40 31 16 N | 075 17 34 W |
| Plum Post Office (historical) | Post Office | 455 | Venango | 41 35 03 N | 079 50 20 W |
| Plumsteadville Post Office | Post Office | 179 | Bucks | 40 22 55 N | 075 08 47 W |
| Pocono Manor Post Office (historical) | Post Office | 520 | Monroe | 41 06 00 N | 075 21 32 W |
| Pocono Post Office (historical) | Post Office | 558 | Monroe | 41 06 54 N | 075 23 09 W |
| Point Pleasent Post Office (historical) | Post Office | 28 | Bucks | 40 25 21 N | 075 03 59 W |
| Polk Post Office (historical) | Post Office | 320 | Venango | 41 22 03 N | 079 55 38 W |
| Pollock Post Office (historical) | Post Office | 344 | Clarion | 41 05 53 N | 079 40 00 W |
| Post Office | Post Office | 142 | Lycoming | 41 10 08 N | 076 52 34 W |
| President Post Office (historical) | Post Office | 318 | Venango | 41 27 25 N | 079 33 28 W |
| Pughtown Post Office (historical) | Post Office | 85 | Chester | 40 10 00 N | 075 39 56 W |
| Puseyville Post Office (historical) | Post Office | 104 | Lancaster | 39 50 58 N | 076 06 43 W |
| Quarryville Post Office (historical) | Post Office | 156 | Lancaster | 39 53 49 N | 076 09 49 W |
| Radnor Post Office (historical) | Post Office | 103 | Delaware | 40 01 48 N | 075 21 59 W |
| Ranshaw Post Office (historical) | Post Office | 261 | Northumberland | 40 47 09 N | 076 31 05 W |
| Rawlinsville Post Office (historical) | Post Office | 270 | Lancaster | 39 52 56 N | 076 16 08 W |
| Reamstown Post Office (historical) | Post Office | 116 | Lancaster | 40 12 41 N | 076 07 34 W |
| Reinholdsville Post Office (historical) | Post Office | 147 | Lancaster | 40 16 04 N | 076 07 39 W |
| Revere Post Office (historical) | Post Office | 152 | Bucks | 40 30 55 N | 075 09 40 W |
| Richboro Post Office (historical) | Post Office | 80 | Bucks | 40 12 54 N | 075 00 39 W |
| Richlandtown Post Office (historical) | Post Office | 160 | Bucks | 40 28 12 N | 075 19 14 W |
| Riegelsville Post Office (historical) | Post Office | 47 | Bucks | 40 35 39 N | 075 11 40 W |
| Rockland Post Office (historical) | Post Office | 448 | Venango | 41 16 17 N | 079 44 52 W |
| Rothsville Post Office (historical) | Post Office | 150 | Lancaster | 40 09 04 N | 076 15 04 W |
| Round Hill Post Office | Post Office | 181 | Adams | 39 57 08 N | 077 04 10 W |
| Runville Post Office (historical) | Post Office | 267 | Centre | 40 57 52 N | 077 50 24 W |
| Rushland Post Office | Post Office | 48 | Bucks | 40 15 29 N | 075 01 50 W |
| Rushland Post Office (historical) | Post Office | 47 | Bucks | 40 15 27 N | 075 01 51 W |
| Rutland Post Office (historical) | Post Office | 420 | Tioga | 41 51 57 N | 076 56 29 W |
| Safe Harbor Post Office (historical) | Post Office | 86 | Lancaster | 39 55 48 N | 076 22 46 W |
| Salisbury Post Office (historical) | Post Office | 149 | Lancaster | 40 02 53 N | 076 01 45 W |
| Salunga Post Office (historical) | Post Office | 124 | Lancaster | 40 06 03 N | 076 25 29 W |
| Sandy Valley Post Office (historical) | Post Office | 430 | Jefferson | 41 07 33 N | 078 52 35 W |
| Schoeneck Post Office (historical) | Post Office | 171 | Lancaster | 40 14 29 N | 076 10 27 W |
| Schuylkill Post Office (historical) | Post Office | 45 | Chester | 40 07 03 N | 075 30 18 W |
| Sellersville Post Office (historical) | Post Office | 104 | Bucks | 40 21 14 N | 075 18 18 W |
| Shade Furnace Post Office (historical) | Post Office | 622 | Somerset | 40 09 06 N | 078 49 38 W |
| Shaft Post Office | Post Office | 338 | Schuylkill | 40 48 44 N | 076 13 15 W |
| Shanksville Post Office (historical) | Post Office | 680 | Somerset | 40 01 04 N | 078 54 26 W |
| Shawanese Post Office (historical) | Post Office | 378 | Luzerne | 41 21 05 N | 076 02 03 W |
| Shawnee on Delaware Post Office (historical) | Post Office | 103 | Monroe | 41 00 44 N | 075 06 39 W |
| Shelly Post Office (historical) | Post Office | 173 | Bucks | 40 28 51 N | 075 22 20 W |
| Sherrat Post Office (historical) | Post Office | 383 | Armstrong | 40 56 05 N | 079 34 16 W |
| Showers Post Office (historical) | Post Office | 474 | Clarion | 41 10 39 N | 079 17 29 W |
| Sidman Post Office (historical) | Post Office | 497 | Cambria | 40 19 50 N | 078 45 05 W |
| Silver Spring Post Office (historical) | Post Office | 121 | Lancaster | 40 03 51 N | 076 26 14 W |
| Silverdale Post Office (historical) | Post Office | 132 | Bucks | 40 20 51 N | 075 16 16 W |
| Sinnemahoning Post Office (historical) | Post Office | 250 | Cameron | 41 19 09 N | 078 05 41 W |
| Sipesville Post Office (historical) | Post Office | 635 | Somerset | 40 05 57 N | 079 05 28 W |
| Six Mile Run Post Office (historical) | Post Office | 344 | Bedford | 40 10 02 N | 078 12 55 W |
| Smithmill Post Office | Post Office | 471 | Clearfield | 40 45 36 N | 078 25 17 W |
| Smithville Post Office (historical) | Post Office | 102 | Lancaster | 39 55 35 N | 076 15 08 W |
| Smokeless Post Office (historical) | Post Office | 325 | Indiana | 40 24 04 N | 079 02 05 W |
| Smokerun Post Office (historical) | Post Office | 414 | Clearfield | 40 47 38 N | 078 25 56 W |
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